import java.util.Scanner;
public class Add {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        double a = sc.nextDouble();
        double b = sc.nextDouble();
        double c = sc.nextDouble();
        System.out.println(add(a, b, c));
    }
    public static int add(int a, int b) {
        return a + b;
    }
    public static double add(double a, double b, double c) {
        return a + b + c;
    }
}